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Old 05-28-2019, 07:09 PM
Jeff in Pa's Avatar
Jeff in Pa Jeff in Pa is offline
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Location: Zionsville, PA
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Default QA chain tensioner save

A member here had a major bearing failure for the chain drive tensioner on his snow thrower. Both needle bearings in the ears completely gave up, the sprocket shifted over into the casting and then the chained jumped off the sprocket. Sometime during the event, the spirol pin sheared.

The reason was lack of grease. The member can NOT be blamed as whoever put needle bearings in used ones that had no provision for grease to actually reach the needle bearings. The grease fittings just smeared grease around the outside of the bearing.

We both looked for a replacement casting but they are next to impossible to find.

I got the piece and used my three ton press to get it apart. ( just barely, I thought I would have to do it at work ).












The picture shows the original sprocket that got against the outer bearing cage and as the steel sprocket wore, it "ate" the casting away. As seen in the replacement sprocket ( it's a plus 1 tooth) , it should be flat.

Since I could get measurements off the sprocket, I made a "mirror image" of a bronze washer to replace the aluminum that was worn away.

I was able to save the transfer shaft. New needle bearings and a new sprocket and now it's ready for next winter.



~~~~~~~~~~~~~~~~~~

I'm having problems attaching pictures. I will email the pics to Roland and he'll add them at his convenience.
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Old 05-29-2019, 08:32 PM
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Thanks for adding the pictures Roland. Greatly appreciated.
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Old 05-29-2019, 10:25 PM
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Looks good, Jeff! That extra tooth should get that snow thrown a little bit more further!
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Old 05-30-2019, 01:02 AM
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Nice Save Jeff! As always top notch work!
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Old 05-30-2019, 07:59 PM
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Quote:
Originally Posted by Billy-O View Post
Looks good, Jeff! That extra tooth should get that snow thrown a little bit more further!
I did not put the plus one on the chain tensioner for the customer. That was used only for the picture. He had a 14 tooth and that's what I replaced it with.

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Originally Posted by jaynjeep View Post
Nice Save Jeff! As always top notch work!
Thanks
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

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